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HD 209458

HD 209458 is an 8th magnitude star in the constellation Pegasus. It is very similar to our Sun, and it is classified as a yellow dwarf (spectral class G0 V). The star is easily visible With good binoculars or small telescope.

Essential Details


Star Designation(s)
TYC 3198-1634-1 (TYC is also known as the Guide Star Catalog GSC)
Position
J2000 RA:22h 03m 10.7723s DEC:+18° 53' 03.548"
Magnitude (Vmag)
7.65
Expected variation
2%
Period
3.524748595 days
Predictions

SIMBAD
Data

Finder Charts

HD209458_location.png
chartt.jpg
Wide Field Finder Chart

chartt.jpg
Detailed Finder Chart

chartt.jpg
comparison stars

Predictions


Here are some predictions for transits at resonable times of night and when the star is at least 45 degrees above the horizon!
Prediction
Altitude
2009/8/31 22:02
54
2009/9/7 23:13
57
2009/9/15 00:24
49
2009/10/30 20:07
56
2009/11/6 21:19
46
2010/8/22 22:01
50
2010/8/29 23:12
57
2010/9/6 00:24
53
2010/10/21 20:7
57
2010/10/28 21:18
51
2011/8/13 22:00
46
2011/8/20 23:12
55
2011/8/28 00:23
56
2011/10/12 20:06
56
2011/10/19 21:18
54

Results

The observations below were obtained on 2009Aug31 by carrying out time series photometry using a C9.25 SCT @ f10 with a MX916 camera, 'V' filter and 10 sec exposures. The 'V' filter in this instance was only used because the target star is so bright for CCD work. The conditions (typically) were less than ideal with intermittent cloud and a long stretch of cloud cover interfering with the observations. The top plot shows all of the data obtained. The next set is the same data but with all of the scatter removed. The bottom plot is this data average every five data points. The dip due to the transit can be seen in this plot.

hd209458bResultsMC01.gif



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Page edited 14 times. Last edit by - Lynx2910 Lynx2910 on May 7, 2014 1:33 pm. This site contains 560 pages
CMHASD - VSS_HD209458